TWM456538U - Soft thick-film integrated touch sensitive display - Google Patents

Description

Soft thick film integrated touch display device

The present invention relates to a touch display device, and more particularly to a soft thick film integrated touch display device.

When a touch function is applied to a display device, a touch panel module using glass as a substrate is usually added to become a glass/glass (G/G), glass/film/film (G/F/F), glass/film (G). /F) or monolithic glass (OGS) or other components, or directly integrate the touch sensor into the display panel, called in-cell (In-cell or On-cell) touch display or touch display Device. The monolithic glass scheme (OGS), compared with two sheets of glass (G/G) or (G/F/F), can reduce the overall thickness, but it is still insufficient, and the glass is heavier than the plastic, and the weight of the module is still It is too heavy, the single-piece plastic sheet solution (OPS) can reduce the weight, the thickness of the plastic sheet used is too thick (>0.5mm) and it is easy to have uneven surface, which may cause the convexity of the display surface when it is fitted. Because the roll-to-roll process cannot be used and the single-piece manufacturing is more difficult than the single-chip glass solution, it is difficult to manufacture and manufacture, and the manufacturing cost is high. The in-cell touch display is thinner. And the weight is lighter, but there is a problem of signal interference and poor product yield.

Therefore, a new solution is needed to give the display device a touch function, which can reduce thickness, weight, and ease of manufacture.

In view of the above background, in order to meet the requirements of the industry, one of the purposes of the present invention is to provide a soft thick film integrated touch display device and a manufacturing method thereof, which can maintain a substrate by selecting a substrate of a suitable thickness. Control module) moderate stiffness, and then absorb the impact and pressure on the substrate (touch module) by selecting a soft optical film of appropriate thickness to reduce the stress after the touch module and the display panel are attached. Both, and prevent display distortion. In addition, this creation can solve the above problems of OGS and OPS, and avoid the trouble of embedded signal interference and low yield.

In order to achieve the above object, according to an embodiment of the present invention, a flexible thick film integrated touch display device is provided, comprising: a thick film plastic substrate having a thickness ranging from 0.2 mm to 0.5 mm, the thick film plastic base The material has a first surface and a second surface; a touch sensor layer is disposed on the first surface of the thick plastic substrate; a soft optical film layer is fully adhered to the thick film plastic a first surface of the substrate on which the touch sensor layer is disposed, wherein the soft optical film layer has a thickness ranging from 0.1 mm to 0.3 mm; and a display panel is fully attached to the soft optical film layer The soft optical film layer is sandwiched between the touch sensor layer and the display panel.

According to the soft thick film integrated touch display device of the present invention, the touch module can be attached to the display panel and has a smooth surface due to proper stiffness, thereby preventing color from being penetrated by the plastic substrate to the display panel due to stress. The problem of mura or ripple, or even the peeling of the touch sensor layer from the display panel occurs.

10‧‧‧Touch display device

11‧‧‧ display panel

12a, 12b‧‧‧Optical frame

13‧‧‧Touching glass

14‧‧‧ glass cover

15‧‧‧Touch sensor layer

16‧‧‧Plastic cover

17a, 17b‧‧‧ optical film layer

100,101‧‧‧Soft thick film integrated touch display device

110‧‧‧ display panel

120‧‧‧Optical film layer

130‧‧‧Touch sensor layer

132‧‧‧Insulation

134‧‧‧Transparent conductive film

X‧‧‧X-axis sensor

Y‧‧‧Y-axis sensor

140‧‧‧Thick film plastic substrate

140a‧‧‧ first surface

140b‧‧‧second surface

150‧‧‧ functional layer

1 is a cross-sectional view showing a touch display device according to a prior art.

2 is a cross-sectional view showing a touch display device according to another prior art.

3 is a cross-sectional view showing a flexible thick film integrated touch display device according to an embodiment of the present invention.

4 is a cross-sectional view showing a flexible thick film integrated touch display device according to another embodiment of the present invention.

FIG. 5 is an exploded perspective view showing a single layer structure of a touch sensor layer according to an embodiment of the present invention.

The above and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only directions referring to the additional drawings. Therefore, the directional terminology used is used to illustrate that it is not intended to limit the creation. In addition, the term "A layer (or component) is disposed on the B layer (or component)" is not limited to the aspect in which the A layer directly contacts the surface of the B layer, for example, the layer A and the layer B are spaced apart from each other. The layer is also covered by the term. In the drawings, the same elements are denoted by the same reference numerals, and the thickness of each layer in the drawings is not drawn according to the thickness ratio in order to clearly illustrate the position of each layer, and the thickness thereof is based on the description of the specification.

1 is a cross-sectional view showing a touch display device according to a prior art. The touch display device 10 includes a display panel 11, an optical masking layer 12a and 12b, a touch panel glass 13, a touch sensor layer 15 formed on both sides of the touch module glass 13, and a glass cover ( Cover glass)14. Furthermore, FIG. 2 is a schematic cross-sectional view showing a touch display device according to another prior art. The touch display device 10' includes a display panel 11, optical film layers 17a and 17b, a touch panel glass 13, and touch sensor layers 15 formed on both sides of the touch module glass 13. Plastic cover 16. The touch display devices 10 and 10' have a problem of a large number of components, a thick overall thickness, and a heavy weight. Furthermore, the use of an optical frame adhesive layer may cause surface irregularities or use a plastic cover to use a finger or a pen. Stresses easily penetrate the display panel during writing, causing problems with color patches or water ripples.

3 is a cross-sectional view showing a flexible thick film integrated touch display device according to an embodiment of the present invention. The flexible thick film integrated touch display device 100 includes a display panel 110, an optical film layer 120, a touch sensor layer 130, and a thick film plastic substrate 140. The touch module (thick film plastic substrate 140 + touch sensor layer 130) and the display panel 120 are optically selected by selecting a thick film plastic substrate 140 of appropriate thickness and a suitable soft optical film layer 120. The film layer 120 is fully adhered to prevent color blocks or water ripples from being penetrated by the plastic substrate to the display panel due to stress, and the protrusion or unevenness of the surface of the device can be prevented. Specifically, a thick film plastic substrate 140 having a suitable stiffness and an optical film layer 120 having a suitable elastic modulus are selected, for example, a thickness of the thick film plastic substrate is in the range of 0.2 mm to 0.5 mm, and the soft optical adhesive is used. When the thickness of the film layer is in the range of 0.1 mm to 0.3 mm, and the thickness exceeds the upper limit of the above range, the process of using the roll-to-roll process cannot be utilized, the production cost is increased, and it is difficult to fully fit the display panel, and the surface may be generated. The surface of the bump and the plastic substrate has a problem of unevenness. Further, if the thickness is lower than the lower limit of the above range, the stiffness of the touch panel is insufficient, and display distortion may occur.

In one embodiment, the thickness of the thick plastic substrate is preferably in the range of 0.2 mm to 0.35 mm.

In one embodiment, the soft optical adhesive layer has a thickness of 0.15 mm to 0.25 mm.

In one embodiment, the elastic optical film layer has an elastic modulus in a range of 1 × 10 ⁴ to 1 × 10 ⁸ Pa, and a range of 1 × 10 ⁴ to 1 × 10 ⁵ Pa is preferable. The elastic optical film layer described above has a too high modulus of elasticity, which may cause a problem of lamination peeling.

Furthermore, FIG. 4 is a cross-sectional view showing a flexible thick film integrated touch display device according to another embodiment of the present invention. The flexible thick film integrated touch display device 101 includes a display panel 110, an optical film layer 120, a touch sensor layer 130, a thick film plastic substrate 140, and a functional layer 150. In one embodiment, the functional layer 150 can be a laminate of an anti-fingerprint layer, a protective layer, a hard coat layer, a printed bezel layer, or a combination of the above layers.

In one embodiment, the touch sensor layer includes: a plurality of X-axis sensors; a plurality of Y-axis sensors; and an insulating layer interposed between the plurality of X-axis sensors and the complex Y-axis sensor The electrical insulation between the plurality of X-axis sensors and the plurality of Y-axis sensors is electrically insulated from each other.

The display panel is, for example, a flat or flexible electrophoretic display panel (EPD), an organic light emitting diode display panel (OLED), a liquid crystal display panel (LCD), or the like.

According to another embodiment of the present invention, a method for manufacturing a flexible thick film integrated touch display device includes the following steps: Step S10: providing a long-length thick film plastic substrate having a first surface And a second surface, wherein the thickness of the thick film plastic substrate is in the range of 0.2 mm to 0.5 mm; and step S20: forming a touch sensor layer on the thick film plastic substrate by using a roll-to-roll method The first surface, wherein the touch sensor layer comprises: a plurality of X-axis sensors; a plurality of Y-axis sensors; and an insulating layer between the complex X-axis sensor and the complex Y-axis sensing The electrical insulation between the plurality of X-axis sensors and the plurality of Y-axis sensors is electrically insulated; and step S30: using a long-length soft optical film to fully conform to the thick-film plastic substrate Forming the touch sensor layer on the first surface, or using a plurality of die-cuts The soft optical film is completely adhered to the first surface of the same size of the die-cut plastic film substrate on which the touch sensor layer is formed, wherein the soft optical film has a thickness of 0.1 a range of mm~0.3 mm; and a step S40: bonding the surface of the long-length soft optical film to the thick plastic substrate, and bonding the plurality of display panels to sandwich the soft optical film A plurality of touch display devices are formed between the sensor layer and the display panel.

In one embodiment, in the above manufacturing method, a method of forming a touch sensor layer is a roll-to-roll low temperature sputtering method or a screen printing method.

In an embodiment, in the manufacturing method, the touch sensor layer may be composed of an indium tin oxide (ITO), a nano silver paste, a nano probe, a conductive polymer, a copper or silver metal mesh, Indium tin oxide (ITO) is preferred. The figure of the touch sensor layer is, for example, an exploded view of the single layer structure of the touch sensor layer 130 shown in FIG. 5 , wherein the touch sensor layer 130 includes a plurality of X sensors and a plurality of Y The sensor is provided with an insulating layer 132 between the X-axis sensor X and the Y-axis sensor Y, and the transparent conductive film 134 bridges the X sensor. The electrode conductive material constituting the touch sensor layer 130 is, for example, indium tin oxide (ITO) having a surface impedance of less than 150 Ω/□, a nano silver paste, a carbon nanotube, a conductive polymer, or a metal of copper or silver. Metal mesh, etc.

In summary, according to the soft thick film integrated touch display device and the manufacturing method thereof, the touch module can be attached to the display panel, and the touch module can be attached to the display panel and has appropriate stiffness. The surface is flat, which prevents the problem of mura or ripple caused by the penetration of the plastic substrate into the display panel, or even the problem that the touch sensor layer is peeled off from the display panel. By selecting a substrate of appropriate thickness and maintaining a moderate stiffness of the substrate (touch module), the impact and pressure on the substrate (touch module) are absorbed by selecting a soft optical film of appropriate thickness. The force is reduced, and the stress unevenness after the touch module and the display panel are attached is reduced to prevent display distortion.

The present invention has been described in detail with reference to the accompanying drawings, and the scope of the present invention is not limited by the scope of the present invention, and various modifications and changes can be made without departing from the spirit and scope of the invention. In addition, any embodiment or application of the present invention is not required to achieve all of the objects or advantages or features disclosed in the present disclosure. In addition, the abstract sections and headings are only used to assist in the search for patent documents and are not intended to limit the scope of the invention.

100‧‧‧Soft thick film integrated touch display device

110‧‧‧ display panel

120‧‧‧Optical film layer

130‧‧‧Touch sensor layer

140‧‧‧Thick film plastic substrate

140a‧‧‧ first surface

140b‧‧‧second surface

Claims (7)

A flexible thick film integrated touch display device comprising: a thick film plastic substrate having a thickness ranging from 0.2 mm to 0.5 mm, the thick film plastic substrate having a first surface and a second surface; The sensor layer is disposed on the first surface of the thick plastic substrate; a soft optical film layer is integrally attached to the thick film plastic substrate and the touch sensor layer is provided a surface of the soft optical film layer having a thickness of 0.1 mm to 0.3 mm; and a display panel integrally bonding with the soft optical film layer to sandwich the soft optical film layer on the touch Between the sensor layer and the display panel. The flexible thick film integrated touch display device according to claim 1 of the patent application further comprises a laminate selected from one of the following functional layers or a combination thereof: an anti-fingerprint layer, a protective layer, a hard coat layer, and a printed border a layer disposed on the second surface of the thick film plastic substrate. The flexible thick film integrated touch display device according to the first aspect of the patent application, further comprising: a decorative film disposed on the second surface of the thick film plastic substrate. The flexible thick film integrated touch display device according to claim 1, wherein the touch sensor layer comprises: a plurality of X-axis sensors; a plurality of Y-axis sensors; and an insulating layer A plurality of X-axis sensors and the plurality of Y-axis sensors electrically insulate the plurality of X-axis sensors from the plurality of Y-axis sensors. The flexible thick film integrated touch display device according to claim 1, wherein the thick plastic substrate has a thickness ranging from 0.2 mm to 0.35 mm. The flexible thick film integrated touch display device according to claim 1, wherein the soft optical adhesive layer has a thickness ranging from 0.15 mm to 0.25 mm. The flexible thick film integrated touch display device according to the first aspect of the invention, wherein the soft optical film layer has an elastic modulus in a range of 1 × 10 ⁴ to 1 × 10 ⁸ Pa.