TWM646385U - Air-laminated optically transparent construction - Google Patents

Abstract

The air-laminated optically transparent structure of this invention includes: a touch screen cover and a wave plate, which are attached to one side of the touch screen cover. A display panel has a display area and a frame surrounding the display area. Glue is applied to the frame and the wave plate is bonded to the display panel so that the wave plate is located between the touch screen cover and the display panel. The wave plate and the display panel are There is an air layer between the panels. In this way, a method similar to Air Bounding is used to effectively improve the problem of multiple reflection and refraction of the display, making the display produce an effect similar to Optical Bounding.

Description

Air-laminated optically clear construction

This creation is related to a display optical bonding technology, specifically an air bonded optically transparent structure.

In the conventional display bonding structure, a common method is frame bonding, which is commonly known in the industry as Air Bounding. The method is to attach a wave plate 11 on a display panel 10, and then use a touch screen cover 12 and The frame of the display panel 10 is bonded with double-sided tape 15 , as shown in FIGS. 1 and 2 , for example. Because the glue of the frame will have a certain thickness, such a structure will leave an air layer 13 between the touch screen cover 12 and the wave plate 11. When external light enters through the touch screen cover 12, because Light will have different reflectivity and refractive index when passing through different interfaces. Therefore, multiple reflections and refractions will be formed between the wave plate 11 and the touch screen cover 12, making the originally pure black surface of the display panel look different in appearance. It appears gray-black, and the visual effect will be a bit of white fog.

In order to improve the aforementioned problems, some people have proposed the method of pouring optical glue 14 between the touch screen cover 12 and the display panel 10 (commonly known as Optical Bounding in the industry), for example: disclosed in domestic patent application No. 100128197 and shown in Figure 3 Show. This method is to set a wave plate 11 on the display panel 10, and then set an optical adhesive 14 on the wave plate, such as OCA (Optical Clear Adhesive) or LOCA (Liquid Optical Clear Adhesive) (OCR), and then put a The touch screen cover 12 is attached to the optical glue 14 so that the optical glue 14 is clamped on the wave plate 11 Between the touch screen cover 12 and the touch screen cover 12 , the original air layer is replaced by the optical glue 14 to reduce the refraction and reflection of external light between the touch screen cover and the wave plate. Although this approach is very effective, it creates other problems. One is the high cost. Because the price of the optical glue itself is relatively high, it will significantly increase the overall manufacturing cost of the display, which is not conducive to market competition. The second reason is that the touch screen cover and the display panel are both hard plate structures that are not easily bent, so the hard plate is attached to the hard plate. Therefore, during the manufacturing process, in order to ensure that the touch screen cover is attached to the optical glue, There will be no air bubbles remaining inside the optical glue. The laminating action must be carried out in a negative pressure environment and must be combined with a degassing procedure in a high-pressure environment. This will also increase processing hours, reduce yield, and increase processing costs. improve.

The main purpose of this creation is to provide an air-laminated optically transparent structure with simple structure but clear effect.

In order to achieve the above main purpose, the air-laminated optically transparent structure of this invention includes: a touch screen cover and a wave plate, which are disposed on one side of the touch screen cover in a glue-coated manner. A display panel has a display area and a frame surrounding the display area. Glue is applied to the frame and the wave plate is bonded to the display panel so that the wave plate is located between the touch screen cover and the display panel. space, and an air layer is left between the wave plate and the display panel.

The air-laminated optically transparent structure created by the above-mentioned structure can effectively improve the wave plate and contact by using a method similar to Air Bounding without significantly changing the manufacturing process and equipment and without increasing the manufacturing cost. Multiple reflection and refraction problems occur between the screen covers, causing the display to produce an effect similar to Optical Bounding.

Preferably, the wave plate is composed of a linear polarizer and a quarter wave polarizer.

Preferably, the polarizing wave plate is disposed between the touch screen cover and the quarter-λ wave plate.

Preferably, a second wave plate is attached to the display panel.

10:Display panel

11: Wave plate

12:Touch screen cover

13: Air layer

14: Optical glue

15:Double-sided tape

20:Touch screen cover

21:Display area

22:Border

30: Wave plate

31:Polarizing wave plate

32: Quarter lambda wave plate

40:Display panel

41:Display area

42:Border

43:Glue

50:Air layer

60:Second Wave Film

Figure 1 is a three-dimensional exploded view of a display used in the past.

Figure 2 is a schematic cross-sectional view of a display used in the past.

Figure 3 is a schematic cross-sectional view of another conventional display.

Figure 4 is a three-dimensional exploded schematic diagram of the first embodiment of the present invention.

Figure 5 is a schematic cross-sectional view of the first embodiment of the present invention.

Figure 6 is a schematic cross-sectional view of the wave plate.

Figure 7 is a schematic cross-sectional view of the second embodiment of the present invention.

The applicant would like to first explain that in the entire description, including the embodiments introduced below and the claims in the patent application scope, terms related to directionality are based on the direction in the drawings. Secondly, in the embodiments and drawings to be introduced below, the same component numbers represent the same or similar components or structural features.

Please refer to Figures 4 to 6, which show the first embodiment of this invention. The air-laminated optically transparent structure of this invention includes: A touch screen cover 20 has a transparent display area 21 and a frame 22 surrounding the display area.

A wave plate 30 is disposed on one side of the touch screen cover 20 in a glue-coated manner. The wave plate is composed of a linear polarizer 31 and a quarter lambda wave plate 32. Wave Polarizer), as shown in Figure 6, the polarizing wave plate is arranged between the touch screen cover and the quarter lambda wave plate during installation.

A display panel 40 has a display area 41 and a frame 42 surrounding the display area. Glue 43 is applied to the frame and the wave plate 30 is bonded to the display panel so that the wave plate 30 is positioned on the touch screen cover. There is an air layer 50 between the plate 20 and the display panel 40 and between the wave plate 30 and the display panel 40 . In this embodiment, the glue 43 used for the frame of the display panel can be liquid or solid glue or double-sided tape, and the display panel 40 is not limited to a special type, and can be PMOLED, AMOLED, MICRO OLED, MINI OLED and so on.

With the structure of the first embodiment of the present invention, when external light enters through the touch screen cover 20, the light path first encounters the touch screen cover 20, where the first reflection and refraction will occur. The refracted light will then pass through the wave plate 30 again. Because the wave plate 30 is composed of a polarizing wave plate 31 (Linear Polarizer) and a quarter λ wave plate 32 (quarter Wave Polarizer), the light will be converted into linearly polarized light when passing through the polarizing wave plate 31. Then the linearly polarized light will be converted into circularly polarized light when passing through the quarter-λ wave plate 32. When the light passes through the wave plate 30 and enters the air layer 50 and is reflected back by the display panel 40, the circularly polarized light will It will be inverted by 180 degrees, and then converted into linearly polarized light when passing through the quarter lambda wave plate 32. At this time, it will be 90 degrees with the linearly polarized light at the time of incident. When it passes through the polarizing wave plate 31 again, the reflected light will be filtered. In addition, there is not much light left that will return to the surface of the touch screen cover 20.

Because the wave plate 30 has flexible characteristics, when the wave plate 30 is attached to the touch screen cover 20, it does not need to be carried out in a negative pressure environment, and there is no subsequent high-pressure defoaming action. Therefore, the structure of this invention can effectively improve the multiple reflections between the wave plate and the touch screen cover using a method similar to Air Bounding without significantly changing the manufacturing process and equipment and without increasing the manufacturing cost. And the problem of refraction makes the display produce an effect like Optical Bounding, achieving the creative purpose of this project.

As shown in Figure 7, it is the second embodiment of the present invention. In this embodiment, the air-laminated optically transparent structure includes: a touch screen cover 20, the touch screen cover has a transparent display area 21 and A border 22 surrounds the display area.

A wave plate 30 is disposed on one side of the touch screen cover 20 in a glue-coated manner. The wave plate is composed of a linear polarizer 31 and a quarter lambda wave plate 32. Wave Polarizer), the polarizing wave plate 31 is arranged between the touch screen cover 20 and the quarter-λ wave plate 32 during installation.

A display panel 40 has a display area 41 and a frame 42 surrounding the display area. A second wave plate 60 is attached to the display panel 40. The second wave plate is composed of a linear polarizer and a quarter wave polarizer. A quarter lambda wave plate is disposed between the touch screen cover 20 and the polarizing wave plate. Glue is applied to the frame of the display panel and the wave plate is bonded to the display panel so that the wave plate 30 is positioned on the display panel. There is an air layer 50 between the touch screen cover 20 and the second wave plate 60 , and between the wave plate 30 and the second wave plate 60 .

The structure of the second embodiment of the present invention can filter out more reflected light and refracted light than the first embodiment, thereby achieving the creative purpose of the present invention.

In addition, in this creation, the angle between the absorption axis of the polarizing wave plate and the slow axis of the quarter-λ wave plate can be between 40 and 45 degrees or between 130 and 140 degrees, and the phase difference value is 135~150nm. The polarizing wave plate and the quarter lambda wave plate are combined in a glued manner.

In addition, a touch circuit layer can be provided on one side of the touch screen cover as required, so that the touch circuit layer is sandwiched between the touch screen cover 20 and the polarizing wave plate 31 .

20:Touch screen cover

21:Display area

22:Border

30: Wave plate

40:Display panel

41:Display area

42:Border

Claims (11)

An air-laminated optically transparent structure containing: A touch screen cover with a transparent display area and a frame surrounding the display area; A wave piece is provided on one side of the touch screen cover in a fitting manner; A display panel has a display area and a frame surrounding the display area. Glue is applied to the frame and the wave plate is bonded to the display panel so that the wave plate is located between the touch screen cover and the display panel. space, and an air layer is left between the wave plate and the display panel. The air-laminated optically transparent structure as described in claim 1, wherein the wave plate is composed of a polarizing wave plate and a quarter-λ wave plate, and during installation, the polarizing wave plate is disposed between the touch screen cover and the between the quarter lambda plates. The air-laminated optically transparent structure as described in claim 2, wherein the angle between the absorption axis of the polarizing wave plate and the slow axis of the quarter-λ wave plate can be between 40 and 45 degrees or between 130 and 130 degrees. between 140 degrees. The air-laminated optically transparent structure described in claim 3, wherein the phase difference value is between 135 and 150 nm. The air-laminated optically transparent structure described in claim 2, wherein a touch circuit layer is provided on one side of the touch screen cover, so that the touch circuit layer is sandwiched between the touch screen cover and the polarizing wave plate. . The air-laminated optically transparent structure of claim 1, wherein a second wave plate is attached to the display panel. The air-laminated optically transparent structure as described in claim 6, wherein the second wave plate is composed of a polarizing wave plate and a quarter-λ wave plate. When installed, the quarter-λ wave plate is placed at between the touch screen cover and the polarizing wave plate. The air-laminated optically transparent structure as described in claim 7, wherein the wave plate is composed of a polarizing wave plate and a quarter-λ wave plate. During installation, the polarizing wave plate is disposed between the touch screen cover and the between quarter lambda plates. The air-laminated optically transparent structure as described in claim 8, wherein the angle between the absorption axis of the polarizing wave plate and the slow axis of the quarter-λ wave plate can be between 40 and 45 degrees or between 130 and 130 degrees. between 140 degrees. The air-laminated optically transparent structure described in claim 9, wherein the phase difference value is between 135 and 150 nm. The air-laminated optically transparent structure of claim 10, wherein a touch circuit layer is provided on one side of the touch screen cover, so that the touch circuit layer is sandwiched between the touch screen cover and the polarizing wave plate. .

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