TW201939135A - Liquid crystal display device with narrow side frame - Google Patents

Abstract

The invention discloses a liquid crystal display device with a narrow side frame. A touch sensing film is made of a flexible material, and is arranged between an upper transparent substrate and a liquid crystal display module. The liquid crystal display module is arranged on the lower side of the touch sensing film. The liquid crystal display device has the advantages that the flexible touch sensing film is formed by extending along at least one lateral side of the liquid crystal display module, and is attached to cover at least one lateral side or bottom surface of the liquid crystal displaymodule after reverse folding, so that a narrow frame and a high screen occupation ratio of a display panel are achieved; a circuit layer on the panel is designed to contract on the lateral side of theliquid crystal display module, and a signal circuit does not need to be arranged on the reverse side of the liquid crystal display module, so that damage to circuits on the reverse side during assembly is avoided, and the touch sensing film on the reverse side is maintained to facilitate reverse folding and adhesion.

Description

Narrow bezel liquid crystal display device

The invention relates to a liquid crystal display device, in particular to a narrow-frame liquid crystal display device with a flexible touch sensing film and a backside design without traces on the liquid crystal display module.

With the development of Liquid Crystal Display (LCD) technology, the liquid crystal display device has gradually developed into a display technology that currently replaces the traditional cathode ray tube (CRT), and has been widely used. In various electronic products. Generally speaking, a liquid crystal display device includes an upper substrate and a lower substrate, and a liquid crystal layer (Liquid Crystal) is interposed between the upper substrate and the lower substrate. The liquid crystal display device has a display area and a shielding area on a panel thereof. The display area can be used to display images, and the shielding area can be used to shield the metal traces on the panel, while avoiding light leakage from the display area. Mostly, the commonly used shielding areas are mostly designed as the frame of the liquid crystal display device.

However, with the rapid development of technology and modern people's pursuit of better visual enjoyment, the design of narrow-frame panels has become one of the major trends in the current development of liquid crystal display devices. In other words, designers want to use the same display device size It can generate and have a larger display area, and can make the liquid crystal display device more beautiful in overall appearance. However, in view of market demand, on the premise that the design of the edge of a liquid crystal display device is gradually approaching the design of a narrow bezel, the narrow bezel configuration of the display device, on the other hand, is equivalent to the width of the masking area on the panel must be greatly reduced. As a result, the problem of how to shield the metal traces is caused.

For example, in the case of full-screen phones, it is equivalent to a new type of liquid crystal display device with an ultra-narrow bezel design on the four sides. Compared with common touch phones, full-screen phones have narrower top and tail regions, and The narrower frame not only has an ultra-high screen ratio, which can give users a better visual experience, and its appearance will also look simpler and more beautiful. However, in order to realize such a narrow frame design with an ultra-high screen ratio, high-density cable layout, processing, and mounting technology need to be adopted, which has become a technical challenge. In addition, the connection between electrical lines on the panel and various sensors and other devices, high-density layout and installation have also increased their difficulty and complexity in virtually, which is a problem that designers in the field need to solve. One of the problems.

Therefore, considering the development of liquid crystal display devices to large size and wide viewing angles, the evaluation of the assemblability of today's narrow-frame LCD panels requires multiple considerations. Therefore, the inventor feels that the above-mentioned deficiency can be improved, and based on the relevant experience in this field for many years, carefully observed and researched it, and combined with the application of science, he proposed a novel design and effectively improved the above-mentioned deficiency. The invention discloses a narrow-frame liquid crystal display device, and the specific structure and implementation thereof will be described in detail below.

In order to solve the problems existing in the conventional technology, an object of the present invention is to provide a liquid crystal display device with a narrow frame. Since a conventional liquid crystal display has a wide wiring area at the edges, more and more users are seeking better The need for visual experience makes narrow-frame LCD devices more favored. Here, the narrow-frame liquid crystal display device disclosed in the present invention utilizes designing a flexible touch sensing film, and bends the flexible touch sensing film, and then attaches the flexible touch sensing film after bending. Attached to the side and back of the liquid crystal display module, thereby greatly reducing the high-density cable layout on the conventional frame, thereby realizing the demand for a narrow-frame display panel.

Another object of the present invention is to provide a narrow-frame liquid crystal display device, which is to improve the back circuit of the liquid crystal display module to reduce the back circuit design to the side, and control the back without signal lines, which solves the conventional back Circuits are vulnerable to damage in order to successfully maintain the output yield of panel products and reduce the cost and complexity of heavy industry.

In view of the above, the present invention discloses a narrow-frame liquid crystal display device, which includes a liquid crystal display module, an upper transparent substrate, an optical adhesive layer, and a touch sensing film. The touch sensing film is disposed on the liquid crystal display module, the optical adhesive layer is disposed between the touch sensing film and the upper transparent substrate, and the touch sensing film is disposed on the liquid crystal display module and the optical adhesive. Between layers, and the touch sensing film is made of flexible material. The touch sensing film disclosed in the present invention is formed by extending along at least one side of the liquid crystal display module located below it, and after being folded back, it is covered and attached to the side of the liquid crystal display module.

According to yet another embodiment of the present invention, the touch sensing film can be covered and attached to the side of the liquid crystal display module, and then re-folded and then attached to the liquid crystal display module. Underside.

A circuit layer is disposed between the optical adhesive layer and the touch sensing film, and the circuit layer is also formed along the side of the liquid crystal display module, and is folded back to cover the side of the liquid crystal display module. . According to an embodiment of the present invention, the circuit layer can completely cover the side of the liquid crystal display module. Alternatively, the circuit layer may partially cover the side of the liquid crystal display module, and all of them can be used to implement the object of the present invention. From this perspective, the narrow-frame liquid crystal display device disclosed in the present invention is an improved design of the circuit layer on the traditional panel to shrink to the side of the liquid crystal display module, so that there is no need to set any signal on the back of the liquid crystal display module. Circuit to avoid the risk of damage to the back circuit in the subsequent assembly process, and at the same time retain the back sensing film to facilitate reverse folding and attachment.

In addition, the narrow-frame liquid crystal display device disclosed in the present invention further includes an adhesive layer disposed between the liquid crystal display module and the touch sensing film, and an adhesive layer disposed between the circuit layer and the optical adhesive layer. The protective layer. According to an embodiment of the present invention, the adhesive layer and the protective layer may be formed along at least one side of the liquid crystal display module located below, and cover the side after being folded back. Or, in another embodiment of the present invention, the adhesive layer and the protective layer can be further affixed to the bottom surface of the liquid crystal display module after a second refolding. In this case, there is only one ground layer between the protective layer located on the bottom surface of the liquid crystal display module and the touch sensing film, and there is no other electrically connected circuit layer or wiring design configuration.

With this design, the narrow-frame liquid crystal display device disclosed in the present invention uses a flexible touch-sensing film to be designed, and the touch-sensing film is bent and attached to the side of the liquid crystal display module. Or the bottom surface, so as to achieve the invention purpose of narrow border and high screen ratio. In addition, the narrow-frame liquid crystal display device disclosed in the present invention further folds the circuit layer to the side of the liquid crystal display module, thereby controlling the back surface of the liquid crystal display module to have no wiring design or only include The ground layer is the only way to avoid the risk of damage to the back line in the subsequent assembly process of the panel. At the same time, the sensor film on the back is retained to facilitate the refolding and attachment. Here, the narrow frame disclosed in the present invention is effectively improved. Yield of liquid crystal display device products.

In the following, detailed descriptions will be made through specific embodiments in conjunction with the accompanying drawings to make it easier to understand the purpose, technical content, features and effects of the present invention.

The above is a description of the content of the present invention, and the following embodiments are used to demonstrate and explain the spirit and principle of the present invention, and provide a further explanation of the scope of the patent application of the present invention. Regarding the features, implementation, and effects of the present invention, the preferred embodiments with reference to the drawings are described in detail below.

In order to effectively enhance the goal of presenting narrow bezels and wide screens in current liquid crystal display devices, the present invention proposes a better improved design for the purpose of the invention, which is a narrow bezel liquid crystal display device. Among them, in order to better understand the technical content of the present invention, please refer to the schematic diagram of the structure shown in FIG. 1, where FIG. 1 is a cross-sectional view of a narrow-frame liquid crystal display device according to an embodiment of the present invention. As shown in the figure, the narrow frame liquid crystal display device 100 includes a liquid crystal display module (Liquid Crystal Module, LCM) 10, an upper transparent substrate (Cover glass) 30, an optical adhesive layer 202, and a touch sensing film. (Touch sensor film) 20. The upper transparent substrate 30 is a glass substrate, which covers the liquid crystal display module 10, the touch sensing film 20, and the optical adhesive layer 202, and forms the liquid crystal display module 10 and the touch panel upward from the bottom in order. The stacked structure of the sensing film 20, the optical adhesive layer 202 and the upper transparent substrate 30. According to an embodiment of the present invention, such a touch sensing film 20 is designed to be made of a flexible material so as to have a flexible property that is flexible. Therefore, in the embodiment of the present invention, such a touch sensing film 20 can be formed along at least one side 11 of the liquid crystal display module 10, and is folded back and attached to the liquid crystal display module 10. At least one side 11.

Please refer to FIG. 2, which is a cross-sectional view of a narrow-frame liquid crystal display device according to another embodiment of the present invention. Furthermore, the touch sensing film 20 disclosed in the present invention can be further along the liquid crystal display module. The side edge 11 of the group 10 continues to extend and is covered and attached to the bottom surface 13 of the liquid crystal display module 10 after a second refolding.

Therefore, it can be clearly seen from the technical contents disclosed in FIG. 1 and FIG. 2 that the present invention designs a touch sensing film 20 made of a flexible material and bends the touch sensing film 20 After folding, it is attached to at least one side 11 of the liquid crystal display module 10 or even extended to the bottom surface 13 so as to achieve the invention object of narrow bezel and high screen ratio of the liquid crystal display device of the present invention. However, considering that the demands on design panels today are mostly symmetrical and balance-oriented, we will use the following: the touch sensing film 20 is bent and attached to both sides of the liquid crystal display module 10 at the same time. As an illustration of a preferred embodiment of the present invention, please refer to FIGS. 3 and 4 as follows.

As shown in FIG. 3, in the present invention, the touch sensing film 20 of flexible material can be designed, and both sides of the touch sensing film 20 can be folded back and covered and attached to both sides 11 and 12 of the liquid crystal display module 10. In order to meet the purpose of the liquid crystal display device pursuing a narrow frame and a symmetrical wide screen. Furthermore, as shown in FIG. 4, the touch sensing film 20 of such a flexible material disclosed in the present invention can further continue from the sides 11, 12 of the liquid crystal display module 10 to the bottom It is extended to be attached to the bottom surface 13 of the liquid crystal display module 10 after the second refolding, thereby retaining the sensing film on the back of the liquid crystal display module 10 to facilitate the refolding, and it can also be used to implement the present invention. Pursue the invention of narrow border and wide screen.

In detail, FIG. 5 is a detailed schematic diagram according to an embodiment of the present invention. As shown in the figure, the narrow-frame liquid crystal display device 100 ′ disclosed in the present invention includes the aforementioned liquid crystal display module 10 and a touch sensing film. 20. The optical adhesive layer 202 and the upper transparent substrate 30 further include a circuit layer 204, an adhesive layer 206, and a protective layer 208. The optical adhesive layer 202 is disposed between the touch sensing film 20 and the upper transparent substrate 30. The optical adhesive layer 202 can be an OCA optical transparent adhesive. Generally speaking, OCA is highly transparent, pure, and free of foreign materials. Affects the visibility and color reproducibility of the final Touch Display Module (TDM) finished product, and does not generate bonding bubbles during subsequent assembly. The finished product will not be exposed to high temperatures and high temperatures during the manufacturing process and after shipment. Under the environmental stress such as humidity or ultraviolet light (UV) exposure, yellowness and peeling (peeling or debonding) of various layers are produced, so it can be used as a key adhesive between touch screens.

According to an embodiment of the present invention, a trace layer 204 is disposed between the optical adhesive layer 202 and the touch sensing film 20, and an adhesive layer 206 is disposed between the liquid crystal display module 10 and the touch sensing film 20. There is also a protective layer 208 between the circuit layer 204 and the optical adhesive layer 202 to protect the electrical wiring from damage. Please refer to FIG. 5 and FIG. 6 together, where FIG. 6 is a partially enlarged schematic diagram of a dotted area according to the embodiment of FIG. 208 series can follow the bending path of the aforementioned touch sensing film 20 and continue to extend along the sides 11 and 12 of both sides of the liquid crystal display module 10 to the bottom so as to be pasted after the second refolding. Attached to the bottom surface 13 of the liquid crystal display module 10. However, it is worth noting that when the circuit layer 204 is folded to the bottom surface 13 of the liquid crystal display module 10 with the touch sensing film 20, the back circuit is often accidentally crushed or bumped during the subsequent assembly or handling process. Injuries and other problems occur, which in turn causes product re-engineering and even seriously affects the yield of panel products.

In order to improve the occurrence of this problem, the present invention proposes a preferred embodiment. Please refer to FIG. 7 and FIG. 8, which are schematic cross-sectional views and partial enlarged views according to a preferred embodiment of the present invention. FIG. 8 is a partially enlarged schematic diagram of a dotted area according to the embodiment in FIG. 7. As shown in the figure, in this preferred embodiment, the present invention only affixes the circuit layer 204 to the side edges 11 and 12 of the liquid crystal display module 10 and does not extend to the bottom surface 13. In other words, the touch sensing film 20 can be affixed to the bottom surface 13 of the liquid crystal display module 10 by two back-folding, so as to simultaneously retain the sensing film on the back side, which is beneficial to the aforementioned adhesive layer 206 and protective layer 208's refolded sticker. Furthermore, according to yet another embodiment of the present invention, the side edges 11, 12 or bottom surface 13 of the liquid crystal display module 10 may be optionally provided with another optical adhesive layer for subsequent panel assembly or system case sticking. For design purposes, this optical adhesive layer can be different from the optical adhesive layer 202 on the front side. Those skilled in the art can change their design on the actual implementation level, which all belong to the scope of the invention.

Furthermore, in order to avoid problems such as inadvertent damage to the back line during subsequent assembly or handling, in a preferred embodiment of the present invention, as shown in FIG. 7 and FIG. 8, the line described The layer 204 is simply wrapped around the sides 11 and 12 of the liquid crystal display module 10 to control the bottom surface 13 of the liquid crystal display module 10 to be a non-electrical routing design; or it includes only a ground layer 210. As shown in the embodiment of the present invention, this circuit layer 204 can completely cover the sides 11, 12 of the liquid crystal display module 10. In other embodiments, of course, it is also possible to choose to only partially cover the liquid crystal display module 10. Both sides 11 and 12 can be used for the purpose of the invention, and should belong to the scope of the invention. Therefore, according to the technical content taught by the present invention, those with ordinary knowledge in the art can change their design on the actual implementation level, which all belong to the scope of the present invention.

In view of the above, it can be clearly seen that, compared with the conventional technology, the present invention does not need to use the high-density cable layout, processing, and mounting technology mentioned in the previous technology, but only needs to design a flexible Touch sensing film, and bend the flexible touch sensing film to be attached to the side and back of the liquid crystal display module after bending, thereby realizing narrow bezel, wide screen and simplicity The beautiful appearance characteristics not only bring users a better visual experience, but also effectively control product cost and production complexity issues. In addition, during the subsequent panel assembly process, the system case can also be snapped or glued to the back of the liquid crystal display module. The invention is applied to greatly increase the application scope of the display panel.

Furthermore, the narrow border liquid crystal display device disclosed in the present invention can still maintain the T-bar on the front of the liquid crystal display module, and the design of the trace (Trace) winding along the side of the liquid crystal display module successfully The circuit design on the back is reduced to the side, and the signal circuit on the back is not designed. This solves the problems of accidental damage to the back circuit during subsequent assembly or handling, so as to maintain a better output yield of the panel.

In summary, the narrow-frame liquid crystal display device disclosed by the present invention does have excellent industrial applicability and competitiveness. It is obvious that the technical features, methods, and effects achieved by the present invention are significantly different from the existing schemes. They are not for those who are familiar with the technology to easily complete them. Therefore, they should have patent requirements. .

10‧‧‧LCD Module

11,12‧‧‧side

13‧‧‧ underside

20‧‧‧ touch sensing film

30‧‧‧ on transparent substrate

100‧‧‧ Narrow bezel LCD device

100’‧‧‧ Narrow bezel LCD device

202‧‧‧Optical adhesive layer

204‧‧‧ Line layer

206‧‧‧Adhesive layer

208‧‧‧protective layer

210‧‧‧ ground plane

FIG. 1 is a cross-sectional view of a narrow-frame liquid crystal display device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a narrow-frame liquid crystal display device according to another embodiment of the present invention. FIG. 3 is a cross-sectional view of a narrow-frame liquid crystal display device according to an embodiment of the present invention. FIG. 4 is a cross-sectional view of a narrow-frame liquid crystal display device according to another embodiment of the present invention. FIG. 5 is a detailed schematic diagram of the embodiment according to FIG. 4. FIG. 6 is a partially enlarged schematic diagram of the embodiment according to FIG. 5. FIG. 7 is a cross-sectional view of a narrow-frame liquid crystal display device according to a preferred embodiment of the present invention. . FIG. 8 is a partially enlarged schematic diagram of the embodiment according to FIG. 7.

Claims (12)

A narrow-frame liquid crystal display device includes: a liquid crystal display module; a touch sensing film disposed on the liquid crystal display module; a transparent substrate disposed on the touch sensing film; And an optical adhesive layer disposed between the touch sensing film and the upper transparent substrate; wherein the touch sensing film is disposed between the liquid crystal display module and the optical adhesive layer, and the touch sensor The test film is made of a flexible material, and the touch sensing film is formed along at least one side of the liquid crystal display module, and is folded back to cover the at least one side of the liquid crystal display module. The narrow-frame liquid crystal display device according to claim 1, further comprising a circuit layer, which is disposed between the optical adhesive layer and the touch sensing film, and the circuit layer is arranged along the liquid crystal display module. The at least one side is extended and covers the at least one side of the liquid crystal display module. The narrow-frame liquid crystal display device according to claim 2, wherein the circuit layer is completely covered or partially covers the at least one side of the liquid crystal display film group. The narrow-frame liquid crystal display device according to claim 2, further comprising an adhesive layer and a protective layer, wherein the adhesive layer is disposed between the liquid crystal display module and the touch sensing film, and the protective layer is disposed Between the circuit layer and the optical adhesive layer. The narrow border liquid crystal display device according to claim 4, wherein the adhesive layer and the protective layer are formed along the at least one side of the liquid crystal display module, and are folded back to cover the at least one of the liquid crystal display module. To one side. The narrow-frame liquid crystal display device according to claim 1, wherein the touch sensing film further extends at least one side of the liquid crystal display film group, and covers the bottom surface of the liquid crystal display module again. The narrow-frame liquid crystal display device according to claim 6, further comprising an optical adhesive layer, which is disposed on the at least one side or the bottom surface of the liquid crystal display film group. The narrow-frame liquid crystal display device according to claim 6, further comprising a circuit layer, which is disposed between the optical adhesive layer and the touch sensing film, and the circuit layer is arranged along the liquid crystal display module. The at least one side is extended and covers the at least one side of the liquid crystal display module. The narrow-frame liquid crystal display device according to claim 8, wherein the circuit layer can completely cover or partially cover the at least one side of the liquid crystal display film group. The narrow-frame liquid crystal display device according to claim 8, further comprising an adhesive layer and a protective layer, wherein the adhesive layer is disposed between the liquid crystal display module and the touch sensing film, and the protective layer is disposed Between the circuit layer and the optical adhesive layer. The narrow frame liquid crystal display device according to claim 10, wherein the adhesive layer and the protective layer are formed along the at least one side of the liquid crystal display module, and cover the liquid crystal display after a second refolding The bottom surface of the module. The narrow-frame liquid crystal display device according to claim 11, further comprising a ground layer, which is located between the protective layer on the bottom surface of the liquid crystal display module and the touch sensing film.